Where are you in Henry County? We are in Henry County as well and there are other VJers here too.
You can drive on your Canadian license until you become a resident of Georgia then you must change it within 30 days. "Resident" means living here, not necessarily having the immigration residency approved. You will also need to register the vehicle and get Georgia plates within the same time frame. You will definitely need a SSN, proof from immigration that you are here legally - and they will only issue a license with the same length of validity as that proof so you may have to wait until you get your EAD card to get a year license and you also need proof of your residency address in the US - we used a bank statement.
It used to be easier but so many States have clamped down on illegals getting access to Driver's Licenses recently that it has made it more difficult on those who are here legally to get them as well, Georgia included. You would get your Driver's License at the State' Departments for motor vehicles (DMV) - the one for Henry County is one in Locust Grove but there is also one in Forest Park (Clayton County). Here is the link for the Locust Grove office:
http://www.dds.ga.gov/locations/dllocations.aspx?csc=94Depending on where you live in Henry County you would apply at the County tag office servicing your area ("tag" means 'license plate", btw) or the DMV office. Your fee is actually a tax that is determined by the value of your vehicle. You will need to have proof of US insurance. Here is the link to the Georgia DMV:
http://www.dmv.org/ga-georgia/department-motor-vehicles.phpYou will need to do an eye exam, a written exam and a driving test before you will be issued a Georgia license, and you will have to turn in your Quebec license - it is illegal in Georgia to have more than one Driver's License in your possession.